{"id":105272,"date":"2022-10-09T09:37:09","date_gmt":"2022-10-09T07:37:09","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov"},"modified":"2022-10-09T09:37:09","modified_gmt":"2022-10-09T07:37:09","slug":"v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/v-openbsd-prinyaty-izmeneniya-dlya-dopolnitelnoj-zashhity-pamyati-proczessov","title":{"rendered":"OpenBSD-s on vastu v\u00f5etud muudatused protsesside m\u00e4lu t\u00e4iendavaks kaitsmiseks.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Theo de Raadt lisas OpenBSD koodibaasi seeria pat\u0161he, et t\u00e4iustada protsesside m\u00e4lukaitset kasutajaruumi tasemel. Arendajatele on pakutud uut s\u00fcsteemik\u00f5net ja sellega seotud sama nime kandev teegifunktsioon mimmutable, mis v\u00f5imaldab lukustada ligip\u00e4\u00e4su \u00f5igusi m\u00e4lu peegeldamisel. P\u00e4rast lukustamist ei ole v\u00f5imalik m\u00e4\u00e4ratud m\u00e4luala \u00f5igusi, n\u00e4iteks kirjutamise ja t\u00e4itmise keeld, edasiste mmap(), mprotect() ja munmap() funktsioonide k\u00f5nede kaudu muuta, mis katse korral annab vea EPERM. <\/p>\n

Uute v\u00f5imalustega objekti failide peegeldatud m\u00e4lu \u00f5iguste muutmiseks on lisatud sektsioon Mutable BSS (.openbsd.mutable, Mutable Block Starting Symbol) ning uued lipud PF_MUTABLE ja UVM_ET_IMMUTABLE. Lingitud programmidesse on lisatud tugi sektsioonide \u00abopenbsd.mutable\u00bb m\u00e4\u00e4ramiseks ja nende paigutamiseks BSS-is eraldi, lehek\u00fclje piiride j\u00e4rgi joondatud alale. Funktsiooni mimmutable kutsumise kaudu on v\u00f5imalik m\u00e4rkida k\u00f5ik peegeldatud alad kui muutumatud (immutable), v\u00e4lja arvatud sektsioonid, mis on m\u00e4rgitud kui \u00abopenbsd.mutable\u00bb. Uus funktsioon j\u00f5uab kasutajateni OpenBSD 7.3 versioonis.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

\u0422\u044d\u043e \u0434\u0435 \u0420\u0430\u0430\u0434\u0442 (Theo de Raadt) \u0434\u043e\u0431\u0430\u0432\u0438\u043b \u0432 \u043a\u043e\u0434\u043e\u0432\u0443\u044e \u0431\u0430\u0437\u0443 OpenBSD \u0441\u0435\u0440\u0438\u044e \u043f\u0430\u0442\u0447\u0435\u0439 \u0434\u043b\u044f \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0439 \u0437\u0430\u0449\u0438\u0442\u044b \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0432 \u0432 \u043f\u0440\u043e\u0441\u0442\u0440\u0430\u043d\u0441\u0442\u0432\u0435 \u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u0442\u0435\u043b\u044f. \u0420\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0447\u0438\u043a\u0430\u043c \u043f\u0440\u0435\u0434\u043b\u043e\u0436\u0435\u043d \u043d\u043e\u0432\u044b\u0439 \u0441\u0438\u0441\u0442\u0435\u043c\u043d\u044b\u0439 \u0432\u044b\u0437\u043e\u0432 \u0438 \u0441\u0432\u044f\u0437\u0430\u043d\u043d\u0430\u044f \u0441 \u043d\u0438\u043c \u043e\u0434\u043d\u043e\u0438\u043c\u0451\u043d\u043d\u0430\u044f \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u0447\u043d\u0430\u044f \u0444\u0443\u043d\u043a\u0446\u0438\u044f mimmutable, \u043f\u043e\u0437\u0432\u043e\u043b\u044f\u044e\u0449\u0430\u044f \u0437\u0430\u0444\u0438\u043a\u0441\u0438\u0440\u043e\u0432\u0430\u0442\u044c \u043f\u0440\u0430\u0432\u0430 \u0434\u043e\u0441\u0442\u0443\u043f\u0430 \u043f\u0440\u0438 \u043e\u0442\u0440\u0430\u0436\u0435\u043d\u0438\u0438 \u0432 \u043f\u0430\u043c\u044f\u0442\u044c (memory mappings). \u041f\u043e\u0441\u043b\u0435 \u0444\u0438\u043a\u0441\u0430\u0446\u0438\u0438, \u0432\u044b\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u044b\u0435 \u0434\u043b\u044f \u043e\u0431\u043b\u0430\u0441\u0442\u0438 \u043f\u0430\u043c\u044f\u0442\u0438 \u043f\u0440\u0430\u0432\u0430, \u043d\u0430\u043f\u0440\u0438\u043c\u0435\u0440, \u0437\u0430\u043f\u0440\u0435\u0442 \u043d\u0430 \u0437\u0430\u043f\u0438\u0441\u044c […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-105272","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47OpenBSD-s on vastu v\u00f5etud muudatused protsesside m\u00e4lu t\u00e4iendava kaitseks | ProHoster","description":"Theo de Raadt lisas OpenBSD koodibaasi seeria plaastrid, et anda t\u00e4iendavat kaitset protsesside m\u00e4lu jaoks 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